User manual

GPX Pro Manual55
© 2012 XT Racing
A full charge takes about 8 hours.
When connected to USB, the GPX will not automatically power down.
You may use any USB charging device (e.g., cigarette lighter, plug-in wall transformer) to charge
the GPX that is capable of supplying about 300 milliamps (ma) of current.
On the default main screen, you will see a battery status indicator. When the GPX is powered by
battery alone, the display will show an approximation of battery charge left (100% = fully charged,
0% = completely discharged).
When the GPX is powered by either a USB connection or a 12V vehicle connection, the display will
show the approximate charging voltage to the battery. The GPX is generally pretty close to fully
charged when that voltage is around 4.0V.
1.10.7 Powering Down
The device does not power down if connected via USB. Therefore, the internal battery will be
continually charged while plugged into USB.
1.10.8 Memory
Each captured session uses several “directory entries”. If there are not enough available directory
entries to store another session, a message will be displayed each time you go to the main
screen.
Also, the main screen shows information on the amount of memory available -- % free, and
minutes free. The percent free is the actual percentage of memory that is available and not in
use. The “minutes free” is the approximate number of minutes of racing time that the timer will
store based on the current data acquisition sampling rates.
1.10.9 File Maintenance
The GPX stores all of its session data, and other information like tracks and settings, in "files" in
its internal flash memory storage. (The GPX contains approximately 8 megabytes of flash
storage.)
There are a limited number of "files" that may be stored in the GPX. For Circuit or Point-to-point
mode, approximately 100 races may be stored before the GPX memory approaches being full. For
Drag mode, approximately 130 races may be stored.
The number of bytes used up by each race depend upon the length of the race, and the amount of
data acquisition data stored. The higher the sample rates for data acquisition channels, the more
memory is consumed each second, and therefore the less total time may be stored in the GPX.
The default main screen shows the approximate number of minutes of racing time that can be